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This is my class :

ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans.xml"); PropertyPlaceholderConfigurer pph = new PropertyPlaceholderConfigurer(); pph.setLocations(new Resource[]{new ClassPathResource("one.properties"), new ClassPathResource("two.properties")}); context.addBeanFactoryPostProcessor(pph); context.refresh(); Controller obj1 = (Controller) context.getBean("controller"); System.out.println(obj1.getMessage()); Controller2 obj2 = (Controller2) context.getBean("controller2"); System.out.println(obj2.getMessage()); System.out.println(obj2.getInteger());

This is the relevant xml configuration: 

 <bean id="controller" class="com.sample.controller.Controller"> <property name="message" value="${ONE_MESSAGE}"/> </bean> <bean id="controller2" class="com.sample.controller.Controller2"> <property name="message" value="${TWO_MESSAGE}"/> <property name="integer" value="${TWO_INTEGER}"/> </bean>

one.properties:

ONE_MESSAGE=ONE

two.properties:

TWO_MESSAGE=TWO TWO_INTEGER=30

TWO_MESSAGE is assigned correctly as String TWO. I am getting NumberFormatException when injecting a TWO_INTEGER. Is there a way to achieve this without adding a setter that takes String and coverts it to int in Controller2 class?

The error :

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'controller2' defined in class path resource [beans.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'integer'; nested exception is java.lang.NumberFormatException: For input string: "${TWO_INTEGER}"

Thanks.

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    The PropertyPlaceholderConfigurer is obviously not finding the properties files or the properties files do not contain any property like ${TWO_INTEGER}. Have you check this? Commented Aug 2, 2013 at 19:27
  • I checked this. In fact, other String properties from the same file are getting assigned correctly. one.properties has : ONE_MESSAGE=ONE and two.properties has : TWO_MESSAGE=TWO TWO_INTEGER=30 and 'TWO_MESSAGE' property is read correctly. Just, to clarify. there are two lines in two.properties not the way its formatted here to show one line.Thanks. Commented Aug 2, 2013 at 19:34
  • You could edit your question and add this relevant information. It will be better formatted as in a comment. Commented Aug 2, 2013 at 19:40
  • Why you can't define PropertyPlaceholderConfigurer in xml file? Commented Aug 2, 2013 at 19:43
  • LaurentG : edited the question. @bellabax : The properties file names are decided at run time. Unless there is a way to define it in xml file and then change it programatically, I have to do it this way. Thanks. Commented Aug 2, 2013 at 19:45

1 Answer 1

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Probably your application falling in this line (please provide full stacketrace if i mistake):

ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");

because Spring can't parse ${TWO_INTEGER} (this properties doesn't loaded in context as yet). So you can just move context initializing after properties loaded:

 ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(); PropertyPlaceholderConfigurer pph = new PropertyPlaceholderConfigurer(); pph.setLocations(new Resource[]{new ClassPathResource("one.properties"), new ClassPathResource("two.properties")}); context.addBeanFactoryPostProcessor(pph); context.setConfigLocation("beans.xml"); context.refresh();

Hope this help.

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1 Comment

It works now. Thanks a lot for the solution and the explanation. Really appreciate it. Curious : Why are the String properties read correctly even when they are in the same file?

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